if you tell them your going to come to their call center with a gun and kill people they should take you off without asking, find out where their headquarters is located, say something like " im going to come down their with a fucking gun and shoot every motherfucker i see if you call one more time, i swear to god"

When they ask for you, tell them "Sorry, he died", and hang up. Crazy. I had the same thing happen to me. Met life was calling me every Sunday on my cellphone. I told them I was dead, and they never called back.